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Identify AIS base stations and high-speed craft

Source: R/AISidentify_stations_aircraft.R
AISidentify_stations_aircraft.Rd

Identify AIS base stations and high-speed craft

Usage

AISidentify_stations_aircraft(ais_data, crs_meters = 3035)

Arguments

ais_data

AIS data frame containing timestamp, lon, lat, and mmsi. timestamp must be Unix time (seconds since 1970-01-01), while lon and lat must be numeric. Another vessel identifier may be used if the column is named mmsi.

crs_meters

CRS (metres) used to calculate distances. Defaults to EPSG:3035.

Value

The input AIS data with the following additional columns:

  • station: Whether the MMSI is classified as a base station.

  • high_speed: Whether the MMSI is classified as a high-speed craft.

  • n_point_mmsi_initial_data: Number of valid AIS positions for the MMSI.

  • id_mmsi_point_initial: Sequential identifier of each AIS position.

Examples

if (FALSE) { # \dontrun{
library(AISanalyze)
data("ais")

ais <- ais %>%
  dplyr::mutate(timestamp = as.numeric(lubridate::ymd_hms(datetime))) %>%
  AIStravel(.)

out <- AISidentify_stations_aircraft(ais_data = ais)} # }